rule win_trochilus_rat_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-07-11"
        version = "1"
        description = "Detects win.trochilus_rat."
        info = "autogenerated rule brought to you by yara-signator"
        tool = "yara-signator v0.6.0"
        signator_config = "callsandjumps;datarefs;binvalue"
        malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.trochilus_rat"
        malpedia_rule_date = "20230705"
        malpedia_hash = "42d0574f4405bd7d2b154d321d345acb18834a41"
        malpedia_version = "20230715"
        malpedia_license = "CC BY-SA 4.0"
        malpedia_sharing = "TLP:WHITE"

    /* DISCLAIMER
     * The strings used in this rule have been automatically selected from the
     * disassembly of memory dumps and unpacked files, using YARA-Signator.
     * The code and documentation is published here:
     * https://github.com/fxb-cocacoding/yara-signator
     * As Malpedia is used as data source, please note that for a given
     * number of families, only single samples are documented.
     * This likely impacts the degree of generalization these rules will offer.
     * Take the described generation method also into consideration when you
     * apply the rules in your use cases and assign them confidence levels.
     */


    strings:
        $sequence_0 = { f7f9 885614 e8???????? 99 f7ff 8b4508 894616 }
            // n = 7, score = 100
            //   f7f9                 | idiv                ecx
            //   885614               | mov                 byte ptr [esi + 0x14], dl
            //   e8????????           |                     
            //   99                   | cdq                 
            //   f7ff                 | idiv                edi
            //   8b4508               | mov                 eax, dword ptr [ebp + 8]
            //   894616               | mov                 dword ptr [esi + 0x16], eax

        $sequence_1 = { ff750c ff7508 50 ff15???????? 8b4d10 8901 }
            // n = 6, score = 100
            //   ff750c               | push                dword ptr [ebp + 0xc]
            //   ff7508               | push                dword ptr [ebp + 8]
            //   50                   | push                eax
            //   ff15????????         |                     
            //   8b4d10               | mov                 ecx, dword ptr [ebp + 0x10]
            //   8901                 | mov                 dword ptr [ecx], eax

        $sequence_2 = { 41 894808 83f908 72e2 8b4808 89048dc47b8100 8b4008 }
            // n = 7, score = 100
            //   41                   | inc                 ecx
            //   894808               | mov                 dword ptr [eax + 8], ecx
            //   83f908               | cmp                 ecx, 8
            //   72e2                 | jb                  0xffffffe4
            //   8b4808               | mov                 ecx, dword ptr [eax + 8]
            //   89048dc47b8100       | mov                 dword ptr [ecx*4 + 0x817bc4], eax
            //   8b4008               | mov                 eax, dword ptr [eax + 8]

        $sequence_3 = { e8???????? 8bf8 85ff 7414 8b06 6a01 8bce }
            // n = 7, score = 100
            //   e8????????           |                     
            //   8bf8                 | mov                 edi, eax
            //   85ff                 | test                edi, edi
            //   7414                 | je                  0x16
            //   8b06                 | mov                 eax, dword ptr [esi]
            //   6a01                 | push                1
            //   8bce                 | mov                 ecx, esi

        $sequence_4 = { 8bce e8???????? ff45ec e9???????? 0fb74738 8b1d???????? 50 }
            // n = 7, score = 100
            //   8bce                 | mov                 ecx, esi
            //   e8????????           |                     
            //   ff45ec               | inc                 dword ptr [ebp - 0x14]
            //   e9????????           |                     
            //   0fb74738             | movzx               eax, word ptr [edi + 0x38]
            //   8b1d????????         |                     
            //   50                   | push                eax

        $sequence_5 = { 8b460c 99 014708 bee81d0110 11570c 8b03 }
            // n = 6, score = 100
            //   8b460c               | mov                 eax, dword ptr [esi + 0xc]
            //   99                   | cdq                 
            //   014708               | add                 dword ptr [edi + 8], eax
            //   bee81d0110           | mov                 esi, 0x10011de8
            //   11570c               | adc                 dword ptr [edi + 0xc], edx
            //   8b03                 | mov                 eax, dword ptr [ebx]

        $sequence_6 = { e8???????? 6a38 8d8568f3ffff 57 50 c78564f3ffff3c000000 e8???????? }
            // n = 7, score = 100
            //   e8????????           |                     
            //   6a38                 | push                0x38
            //   8d8568f3ffff         | lea                 eax, [ebp - 0xc98]
            //   57                   | push                edi
            //   50                   | push                eax
            //   c78564f3ffff3c000000     | mov    dword ptr [ebp - 0xc9c], 0x3c
            //   e8????????           |                     

        $sequence_7 = { 6a5b 68???????? 6a00 e8???????? 83c414 33c0 }
            // n = 6, score = 100
            //   6a5b                 | push                0x5b
            //   68????????           |                     
            //   6a00                 | push                0
            //   e8????????           |                     
            //   83c414               | add                 esp, 0x14
            //   33c0                 | xor                 eax, eax

        $sequence_8 = { 6880000110 e8???????? 33d2 8955e4 8b4510 8b4804 3bca }
            // n = 7, score = 100
            //   6880000110           | push                0x10010080
            //   e8????????           |                     
            //   33d2                 | xor                 edx, edx
            //   8955e4               | mov                 dword ptr [ebp - 0x1c], edx
            //   8b4510               | mov                 eax, dword ptr [ebp + 0x10]
            //   8b4804               | mov                 ecx, dword ptr [eax + 4]
            //   3bca                 | cmp                 ecx, edx

        $sequence_9 = { ff37 83c615 50 56 e8???????? 83c428 6a04 }
            // n = 7, score = 100
            //   ff37                 | push                dword ptr [edi]
            //   83c615               | add                 esi, 0x15
            //   50                   | push                eax
            //   56                   | push                esi
            //   e8????????           |                     
            //   83c428               | add                 esp, 0x28
            //   6a04                 | push                4

    condition:
        7 of them and filesize < 630784
}